EP4257552A1 - Verfahren zur herstellung von lithiumhydroxid - Google Patents

Verfahren zur herstellung von lithiumhydroxid Download PDF

Info

Publication number
EP4257552A1
EP4257552A1 EP22911002.8A EP22911002A EP4257552A1 EP 4257552 A1 EP4257552 A1 EP 4257552A1 EP 22911002 A EP22911002 A EP 22911002A EP 4257552 A1 EP4257552 A1 EP 4257552A1
Authority
EP
European Patent Office
Prior art keywords
lithium
lithium hydroxide
containing solution
carbonate
producing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22911002.8A
Other languages
English (en)
French (fr)
Inventor
Yusuke SENBA
Masatoshi Takano
Satoshi Asano
Shin-ichi HEGURI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Metal Mining Co Ltd
Original Assignee
Sumitomo Metal Mining Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Mining Co Ltd filed Critical Sumitomo Metal Mining Co Ltd
Publication of EP4257552A1 publication Critical patent/EP4257552A1/de
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/10—Obtaining alkali metals
    • C22B26/12—Obtaining lithium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D15/00—Lithium compounds
    • C01D15/02—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D15/00—Lithium compounds
    • C01D15/08—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Definitions

  • the present invention relates to a method for producing lithium hydroxide. More specifically, the present invention relates to a method for producing lithium hydroxide including a conversion step by electrodialysis.
  • lithium hydroxide is obtained by, for example, adding slaked lime to lithium carbonate to substitute a hydroxyl group.
  • lithium carbonate is used as a starting material as a starting material because it is less likely to degenerate compared with other lithium compounds, and can be stored for a long time.
  • this producing method for obtaining the lithium hydroxide from the lithium carbonate has a problem of an increased production cost due to a high cost of agents.
  • Patent Document 1 discloses a method that uses electrodialysis (membrane separation) and ion-exchange resin as a method for producing lithium hydroxide from lithium carbonate. This method discloses that polyvalent metals with a valence of two or more, such as calcium described above, can be reduced.
  • Patent Document 1 JP-A-2009-270189
  • Non-Patent Document 1 Masao Kobayashi, Lithium, its History, Source, Production, and Application, Journal of the Mining Institute of Japan, Japan, 1984, volume 100 issue 1152, 115-122
  • concentrations of the polyvalent metals with a valence of two or more, such as calcium, in an electrolyte are increased in the electrodialysis, a used barrier membrane is easily damaged.
  • concentrations of the polyvalent metals, such as calcium, in the electrolyte need to be less than 0.05 mg/L before the electrodialysis is performed in order to reduce this damage.
  • a method for producing lithium hydroxide according to a first invention includes steps (1) to (5) below: (1) a hydrocarbonating step of blowing carbon dioxide to a slurry of a mixture of water and rough lithium carbonate to obtain a lithium hydrogen carbonate solution; (2) a decarbonation step of heating the lithium hydrogen carbonate solution to obtain a purified lithium carbonate; (3) an acid solution dissolution step of dissolving the purified lithium carbonate in an acid solution to obtain a first lithium containing solution; (4) an impurity removal step of removing a part of metal ions from the first lithium containing solution to obtain a second lithium containing solution; and (5) a conversion step of converting lithium salt contained in the second lithium containing solution into lithium hydroxide by electrodialysis to obtain a lithium hydroxide containing solution in which the lithium hydroxide is dissolved.
  • the method for producing lithium hydroxide according to a second invention which is in the first invention, includes a crystallization step of solidifying the lithium hydroxide dissolved in the lithium hydroxide containing solution after the conversion step.
  • the impurity removal step includes: a pH adjustment step of adjusting a pH by adding alkali to the first lithium containing solution to obtain a post-pH adjustment liquid; and an ion exchange step of bringing the post-pH adjustment liquid into contact with ion-exchange resin to obtain the second lithium containing solution.
  • the impurity removal step includes: a step of adding an oxidant to the first lithium containing solution to obtain a post-oxidation liquid; a pH adjustment step of adjusting a pH by adding alkali into the post-oxidation liquid to obtain a post-pH adjustment liquid; and an ion exchange step of bringing the post-pH adjustment liquid into contact with ion-exchange resin to obtain the second lithium containing solution.
  • the pH of the post-pH adjustment liquid after the pH adjustment step is 6 or more and 10 or less.
  • the alkali includes lithium carbonate or lithium hydroxide.
  • the lithium carbonate is the purified lithium carbonate obtained in the decarbonation step.
  • the lithium hydrogen carbonate solution is heated at 60°C or more and 90°C or less.
  • executing the hydrocarbonating step, the decarbonation step, and the acid solution dissolution step in the step before the conversion step by electrodialysis allows reliably removing the metals other than lithium, and therefore, a purity of the obtained lithium hydroxide can be increased. Additionally, the concentrations of polyvalent metals with a valence of two or more, such as calcium, in the electrolyte can be lowered, and therefore, a damage of a barrier membrane used in the conversion step after these steps can be reduced.
  • the crystallization step of solidifying the lithium hydroxide is provided after the conversion step, and therefore, the lithium hydroxide can be solidified to have a high purity using a difference in solubility.
  • the impurity removal step includes the ion exchange step of using the ion-exchange resin and the pH adjustment step of adding the alkali before the ion exchange step, and therefore, the pH can be adjusted to be appropriate for the subsequent ion exchange step in the pH adjustment step and a removal rate of divalent or more metals is substantially improved in the ion exchange step.
  • the impurity removal step includes the ion exchange step of using the ion-exchange resin, and the oxidation step of adding the oxidant and the pH adjustment step of adding the alkali before the ion exchange step, and therefore, manganese can be removed when the manganese is contained in the first lithium containing solution, and the pH can be adjusted to be appropriate for the subsequent ion exchange step in the pH adjustment step, thereby substantially improving a removal rate of divalent or more metals in the ion exchange step.
  • the pH of the post-pH adjustment liquid after the pH adjustment step is 6 or more and 10 or less, and therefore, the impurities are removed with more certainty in the ion exchange step after the pH adjustment step.
  • the alkali contains the lithium carbonate or lithium hydroxide, and therefore, the added alkali can be avoided from being added with impurities, such as sodium or potassium.
  • the lithium carbonate is the purified lithium carbonate obtained in the decarbonation step, and therefore, the use of the product obtained in the previous step allows saving an extra cost.
  • the heating is 60°C or more and 90°C or less, and therefore, a process period in the decarbonation step can be shortened.
  • the method for producing lithium hydroxide according to the present invention includes the steps (1) to (5) below; (1) a hydrocarbonating step: a step of blowing carbon dioxide to a slurry of a mixture of water and rough lithium carbonate to obtain a lithium hydrogen carbonate solution; (2) a decarbonation step: a step of heating the lithium hydrogen carbonate solution to obtain purified lithium carbonate; (3) an acid solution dissolution step: a step of dissolving the purified lithium carbonate in an acid solution to obtain a first lithium containing solution; (4) an impurity removal step: a step of removing a part of metal ions from the first lithium containing solution to obtain a second lithium containing solution; (5) a conversion step: a step of converting lithium salt contained in the second lithium containing solution into lithium hydroxide by electrodialysis to obtain a lithium hydroxide containing solution in which the lithium hydroxide is dissolved.
  • the present invention allows reliably removing metals other than lithium by executing the hydrocarbonating step, the decarbonation step, and the acid solution dissolution step in a step before the conversion step by electrodialysis, thereby allowing an increased purity of obtained lithium hydroxide. Additionally, concentrations of polyvalent metals with a valence of two or more, such as calcium, in an electrolyte can be lowered, thereby allowing a reduced damage of a barrier membrane used in the conversion step after these steps.
  • the method for producing lithium hydroxide it is preferred to provide a crystallization step of solidifying the lithium hydroxide dissolved in the lithium hydroxide containing solution after the conversion step.
  • This aspect allows solidifying the lithium hydroxide to have a high purity using a difference in solubility.
  • the impurity removal step includes a pH adjustment step of adjusting a pH by adding alkali into the first lithium containing solution to obtain a post-pH adjustment liquid and an ion exchange step of bringing the post-pH adjustment liquid into contact with ion-exchange resin to obtain the second lithium containing solution.
  • This aspect allows the pH to be adjusted to be appropriate for the subsequent ion exchange step, and a removal rate of divalent or more metals is substantially improved in the ion exchange step.
  • the impurity removal step includes a step of adding an oxidant to the first lithium containing solution to obtain a post-oxidation liquid, a pH adjustment step of adjusting a pH by adding alkali into the post-oxidation liquid to obtain a post-pH adjustment liquid, and an ion exchange step of bringing the post-pH adjustment liquid into contact with ion-exchange resin to obtain the second lithium containing solution.
  • This aspect allows removing manganese when the manganese is contained in the first lithium containing solution, and allows pH to be adjusted to be appropriate for the subsequent ion exchange step in the pH adjustment step, and a removal rate of divalent or more metals is substantially improved in the ion exchange step.
  • a pH of the post-pH adjustment liquid after the pH adjustment step is preferred to be 6 or more and 10 or less. This aspect allows removing impurities with more certainty in the ion exchange step after the pH adjustment step.
  • the alkali used in the pH adjustment step is preferred to be the purified lithium carbonate obtained in the decarbonation step. This aspect allows avoiding impurities, such as sodium or potassium, from being added. Additionally, since the product obtained from the previous step is used, an extra cost can be saved.
  • the lithium hydrogen carbonate solution in the decarbonation step, is heated at 60°C or more and 90°C or less. This aspect allows shortening a process period in the decarbonation step.
  • Fig. 1 illustrates a flowchart of a method for producing lithium hydroxide according to a first embodiment of the present invention.
  • This embodiment executes (1) a hydrocarbonating step, (2) a decarbonation step, (3) an acid solution dissolution step, (4) an impurity removal step, and (5) conversion step in this order.
  • the hydrocarbonating step is performed first.
  • the hydrocarbonating step is a step of blowing carbon dioxide to a slurry of a mixture of water and rough lithium carbonate to obtain a lithium hydrogen carbonate solution.
  • the "rough lithium carbonate” means one that contains lithium carbonate as a main component and has a high proportion of impurities compared with a "purified lithium carbonate" described later.
  • lithium carbonate high in impurity obtained by the method disclosed in Masao Kobayashi, Lithium, its History, Source, Production, and Application, Journal of the Mining Institute of Japan, Japan, 1984, volume 100 issue 1152, 115-122 from a brine, such as a salt lake brine, a geothermal brine, and a petroleum brine, or a leaching solution of lithium ore or the like corresponds to the "rough lithium carbonate.”
  • the rough lithium carbonate reacts with carbon dioxide and water to be converted into lithium hydrogen carbonate high in solubility, and thus, a lithium hydrogen carbonate solution is obtained. That is, the lithium hydrogen carbonate melts into a liquid to turn into the lithium hydrogen carbonate solution, and other sparingly soluble impurities solidifies. For example, this impurity is calcium carbonate. Thus separating solid and liquid allows removing the calcium carbonate and the like as the impurities.
  • the temperature is preferred to be 20°C or more and 40°C or less.
  • the blown carbon dioxide preferably has an amount immediately before the unreacted and insoluble carbon dioxide starts to come out in a form of air bubbles.
  • the lithium hydrogen carbonate in the decarbonation step, by heating the lithium hydrogen carbonate solution, the lithium hydrogen carbonate is converted into the purified lithium carbonate having a low solubility, and the purified lithium carbonate is precipitated again to obtain the purified lithium carbonate.
  • the rough lithium carbonate contains a high concentration of sodium in some cases.
  • the lithium carbonate in the rough lithium carbonate is dissolved as the lithium hydrogen carbonate having a high solubility in the hydrocarbonating step.
  • the lithium hydrogen carbonate is turned into lithium carbonate again in a form of the purified lithium carbonate in the decarbonation step to precipitate the purified lithium carbonate.
  • the "purified lithium carbonate” means one that contains lithium carbonate as a main component and has a low proportion of impurities compared with the "rough lithium carbonate” described above.
  • the sodium is almost removed from the precipitated purified lithium carbonate, and thus, the purity of the purified lithium carbonate can be increased.
  • the purified lithium carbonate as the precipitate and the supernatant are separated into solid and liquid, thus allowing obtaining the purified lithium carbonate as a solid material.
  • the decarbonation step according to the embodiment was performed at 80°C, but it is not limited to this. For example, it is preferred to be performed at 60°C or more and 90°C or less. This aspect allows shortening a process period in the decarbonation step.
  • the heating method is not particularly limited, and it is preferred to employ a method that corresponds to a scale of a reaction container. For example, a Teflon (Registered Trademark) heater or steam heating can be employed.
  • a filter press is used in the solid-liquid separation in the decarbonation step according to the embodiment.
  • the purified lithium carbonate obtained in the decarbonation step is dissolved with an acid solution to obtain a lithium salt solution.
  • the use of the lithium carbonate for the subsequent conversion step causes two problems: the low solubility of the lithium carbonate allows only conversion with thin liquid, and efficiency is poor (the size of facility becomes large with respect to throughput); and carbonic acid gas is possibility generated during conversion, possibly damaging the membrane.
  • the purified lithium carbonate is dissolved with an acid solution to turn into a first lithium salt solution as the lithium salt solution. Since the pH decreases after the acid solution dissolution, adjusting the pH to the pH appropriate for impurity removal is preferred in the ion exchange step.
  • the acid used in the acid solution dissolution step is hydrochloric acid, sulfuric acid, nitric acid, and the like.
  • Hydrochloric acid is used in this embodiment, and a lithium chloride solution is obtained as a lithium salt solution in the acid solution dissolution step.
  • the chemical reaction formula is illustrated in Formula 3. [Formula 3] Li 2 CO 3 + 2HCl ⁇ 2LiCl + H 2 O + CO 2
  • the amount of acid solution used in the acid solution dissolution step is preferably the minimum necessary amount.
  • the pH is preferably adjusted to be 8.5.
  • Fig. 1 illustrates a flowchart illustrating a configuration of the impurity removal step according to the embodiment.
  • the impurity removal step includes the pH adjustment step and the ion exchange step. Note that the impurity removal step is not limited to the configuration illustrated here.
  • the pH adjustment step alkali is added to the first lithium containing solution and a pH is adjusted to obtain a pH adjusted liquid. At this time, depending on the adjustment pH or the impurity concentration, a pH adjustment sediment containing some impurities is obtained.
  • the post-pH adjustment liquid is adjusted to a pH appropriate for removing impurities, such as Ca and Mg, in the ion exchange step subsequent to this.
  • the pH is preferred to be 6 or more and 10 or less. When the pH is smaller than 6, the impurity removal in the ion exchange step may be insufficient. When the pH is larger than 10, an amount of added alkali is too much.
  • the post-pH adjustment liquid is even more preferred to be pH 7.5 or more and pH 8.5 or less. This is because an additive amount of the neutralizer can be reduced and a necessary impurity removal performance can be expected.
  • the alkali is preferred to be one that does not contain sodium or potassium.
  • the alkali is preferred to contain lithium carbonate or lithium hydroxide.
  • the lithium carbonate needs to be lithium carbonate with a 99% or more purity
  • the lithium hydroxide needs to be lithium hydroxide with a 99% or more purity.
  • this lithium carbonate is more preferred to be the purified lithium carbonate obtained after undergoing the above-described decarbonation step. This aspect allows avoiding the impurities, such as sodium or potassium, from being added. Additionally, the use of the product obtained in the previous step allows saving an extra cost.
  • a second lithium containing solution from which a part of impurities has been removed is obtained. While in the ion exchange step, divalent or more metal ions are removed, calcium, aluminum, manganese, and magnesium by an amount of the solubility that remains corresponding to the pH in the pH adjustment step are also removed at this time.
  • Chelating resin is preferably used as the ion-exchange resin.
  • iminodiacetic acid resin can be used.
  • Amberlite IRC748 can be used.
  • a preferred value is determined as the pH of the post-pH adjustment liquid in the ion exchange step depending on the ion-exchange resin.
  • the ion exchange step is preferably performed directly on the first lithium containing solution obtained in the acid solution dissolution step.
  • the method for contacting the ion-exchange resin and the post-pH adjustment liquid is preferably a column method. However, there may be a case where a batch mixing method is employed.
  • lithium salt contained in the second lithium containing solution is converted into lithium hydroxide to obtain a lithium hydroxide containing solution in which lithium hydroxide is dissolved.
  • the lithium salt is lithium chloride.
  • the lithium salt is dissolved with the acid used in the acid solution dissolution step in the impurity removal step.
  • an electrodialysis using a bipolar membrane is performed to convert these aqueous solutions into the lithium hydroxide containing solution containing lithium hydroxide and hydrochloric acid.
  • lithium chloride in the second lithium containing solution is decomposed, lithium ions of lithium chloride pass through a cation membrane and bind to hydroxide ions to become lithium hydroxide, and chloride ions pass through an anion membrane to become hydrochloric acid.
  • the recovered hydrochloric acid can be recycled to the elution step. Accordingly, the usage of mineral acid can be reduced.
  • an electrodialysis using an ion-exchange membrane corresponds to the conversion step in addition to the electrodialysis using the bipolar membrane.
  • a cation-exchange membrane is used as the ion-exchange membrane, lithium hydroxide is generated in a cathode chamber.
  • Fig. 3 depicts a flowchart of the impurity removal step of the method for producing lithium hydroxide according to the second embodiment of the present invention.
  • This embodiment differs from the first embodiment in that the oxidation step is included before the pH adjustment step in the impurity removal step and is otherwise same as the first embodiment.
  • the following describes the neutralization step according to the second embodiment.
  • the oxidation step is a step of adding an oxidant, such as air, oxygen, and sodium hypochlorite, to the first lithium containing solution obtained in the acid solution dissolution step to oxidize manganese in the first lithium containing solution and obtain insoluble manganese dioxide, thereby precipitating to remove the manganese dissolved in the liquid to obtain a post-oxidation liquid.
  • an oxidant such as air, oxygen, and sodium hypochlorite
  • the oxidant used in the oxidation step air, oxygen, sodium hypochlorite, or the like can be employed.
  • the first lithium containing solution has a redox potential set to a pH and an electric potential in a region of manganese dioxide in a Pourbaix diagram.
  • the obtained post-oxidation liquid is put to the pH adjustment step after the oxidation step.
  • a crystallization step of solidifying lithium hydroxide dissolved in the lithium hydroxide containing solution is provided after the conversion step.
  • the crystallization step is indicated by the dotted line in Fig. 1 .
  • lithium hydroxide containing solution obtained in the conversion step When the lithium hydroxide containing solution obtained in the conversion step is evaporated to dryness, lithium hydroxide is obtained.
  • this lithium hydroxide containing solution contains alkali metals, such as sodium or potassium, and the direct evaporation to dryness causes a solid material obtained from it to contain much hydroxides other than lithium hydroxide.
  • the crystallization step of solidifying lithium hydroxide dissolved in the lithium hydroxide containing solution is preferably provided after the conversion step.
  • the crystallization step by solidifying the lithium hydroxide dissolved in the lithium hydroxide containing solution, a solid lithium hydroxide is obtained.
  • a crystallization mother liquor is obtained together with the solid lithium hydroxide.
  • lithium becomes a lithium hydroxide
  • chlorine ions as anions also pass through the membrane to be contained in the lithium hydroxide containing solution.
  • the difference in solubility between the respective hydroxides is used to solidify the lithium hydroxide and separate contained impurities.
  • the lithium hydroxide containing solution is heated to be concentrated.
  • the concentration of metal ions contained in the liquid increases, and lithium hydroxide having a relatively low solubility is deposited and solidified first.
  • the deposited lithium hydroxide is recovered as the solid lithium hydroxide.
  • sodium hydroxide or potassium hydroxide having relatively high solubility is not deposited and remains in the aqueous solution. Therefore, the purity of the recovered lithium hydroxide increases.
  • the solubility of lithium hydroxide is 13.2 g/100 g-water, and it is seen that the solubility of lithium hydroxide is significantly low compared with 174 g/100 g-water of sodium hydroxide and 154 g/100 g-water of potassium hydroxide. Since the chlorine ion is 2 g/L also during the operation of heating to concentrate, the chlorine ion is not deposited as chloride of the alkali metal in the lithium hydroxide.
  • This step can be industrially performed with a continuous crystallization using a crystallization can. It can be performed also with a batch crystallization.
  • the crystallization mother liquor generated in the crystallization step is a concentrated alkaline aqueous solution. Since the crystallization mother liquor contains lithium hydroxide by an amount of the solubility, repeating the lithium adsorption step increases a lithium recovery rate. In addition, the neutralizer cost decreases.
  • the purified lithium carbonate obtained in the above-described decarbonation step was added to the first lithium containing solution obtained in the acid solution dissolution step, and a pH was adjusted to remove impurities in the ion exchange step.
  • the stirring and mixing was performed to obtain pH of 8.4, and a post-pH adjustment liquid was obtained. This step was all performed at ordinary temperature. Contained metals as the impurities are shown in Table 4. It is seen that the content of sodium is significantly reduced by undergoing the decarbonation step, the acid solution dissolution step, and the pH adjustment step.
  • Fig. 4 illustrates a relation between an energizing time and a lithium concentration in the lithium hydroxide containing solution.
  • the lithium concentration in the lithium hydroxide containing solution increased along with the energization, and was concentrated to 28 g/L to 29 g/L in the end.
  • Table 6 shows a metal concentration after the electrodialysis.
  • Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the decarbonation step was not performed in the steps of Example 1. Other than this, Comparative Example 1 was all performed under the same conditions. That is, the lithium hydrogen carbonate solution obtained in the hydrocarbonating step was directly added with hydrochloric acid to perform the acid solution dissolution step, and thereafter, a lithium hydroxide containing solution was obtained through the impurity removal step and the conversion step. The result is shown in Table 8. Compared with Table 6, it is seen that a significantly high concentration of sodium is contained.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
EP22911002.8A 2021-12-22 2022-12-13 Verfahren zur herstellung von lithiumhydroxid Pending EP4257552A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021207750A JP2023092624A (ja) 2021-12-22 2021-12-22 水酸化リチウムの製造方法
PCT/JP2022/045799 WO2023120294A1 (ja) 2021-12-22 2022-12-13 水酸化リチウムの製造方法

Publications (1)

Publication Number Publication Date
EP4257552A1 true EP4257552A1 (de) 2023-10-11

Family

ID=86902407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22911002.8A Pending EP4257552A1 (de) 2021-12-22 2022-12-13 Verfahren zur herstellung von lithiumhydroxid

Country Status (6)

Country Link
EP (1) EP4257552A1 (de)
JP (1) JP2023092624A (de)
AR (1) AR128042A1 (de)
AU (1) AU2022423803A1 (de)
CL (1) CL2023002828A1 (de)
WO (1) WO2023120294A1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4823698A (de) * 1972-07-29 1973-03-27
JPS62252315A (ja) * 1986-04-23 1987-11-04 Nippon Chem Ind Co Ltd:The 高純度炭酸リチウムの製造法
US6048507A (en) * 1997-12-09 2000-04-11 Limtech Process for the purification of lithium carbonate
DE19809420A1 (de) * 1998-03-05 1999-09-09 Basf Ag Verfahren zur Herstellung von hochreinen Lithiumsalzen
JPH11310413A (ja) * 1998-04-27 1999-11-09 Mitsui Chem Inc 高純度炭酸リチウムの製造方法
JP2009270189A (ja) 2008-05-07 2009-11-19 Kee:Kk 高純度水酸化リチウムの製法
JP6986997B2 (ja) * 2018-03-06 2021-12-22 Ｊｘ金属株式会社 炭酸リチウムの製造方法及び、炭酸リチウム
CN109850927B (zh) * 2019-03-29 2021-04-20 四川顺应动力电池材料有限公司 一种制取高纯氢氧化锂的方法
JP2020193130A (ja) * 2019-05-30 2020-12-03 住友金属鉱山株式会社 水酸化リチウムの製造方法
JP7156322B2 (ja) * 2020-02-17 2022-10-19 住友金属鉱山株式会社 水酸化リチウムの製造方法

Also Published As

Publication number Publication date
AR128042A1 (es) 2024-03-20
AU2022423803A9 (en) 2023-08-17
JP2023092624A (ja) 2023-07-04
WO2023120294A1 (ja) 2023-06-29
AU2022423803A1 (en) 2023-07-20
CL2023002828A1 (es) 2024-03-01

Similar Documents

Publication Publication Date Title
US20230303401A1 (en) Preparation of lithium carbonate from lithium chloride containing brines
EP2560920B1 (de) Verfahren zur herstellung von lithiumcarbonat aus lithiumchlorid
EP3524575B1 (de) Verfahren zur herstellung einer lithiumverbindung
KR20110008227A (ko) 고순도 수산화리튬 및 염화수소산의 제조 방법
JP2019099874A (ja) リチウムの回収方法
CA2736379C (en) Process for the production of high purity magnesium hydroxide
JP6299620B2 (ja) 硫酸ニッケルの製造方法
JP2020193130A (ja) 水酸化リチウムの製造方法
CN115087621A (zh) 氢氧化锂的制造方法
AU1135600A (en) Separation and concentration method
JPH033747B2 (de)
EP4257552A1 (de) Verfahren zur herstellung von lithiumhydroxid
TWI811993B (zh) 硫酸鈷之製造方法
JP6122899B2 (ja) 塩化リチウムから炭酸リチウムを製造する方法
EP4349781A1 (de) Verfahren zur herstellung einer lithiumhaltigen lösung und verfahren zur herstellung von lithiumhydroxid
WO2023054258A1 (ja) 水酸化リチウムの製造方法
EP4116262A1 (de) Herstellungsverfahren für kobaltsulfat
RU2374343C1 (ru) Способ выделения ванадия из водных натрийсодержащих растворов
WO2024000013A1 (en) A process for treating impurity containing streams
WO2024064916A2 (en) Electrochemical production of alkali metal hydroxides and sulfuric acid from battery manufacturing and recycling outlet streams
CN113292094A (zh) 一种去除次氧化锌原料中氯根、硫酸根的方法
JP2015157753A (ja) 塩化リチウムから炭酸リチウムを製造する方法
JPH11335337A (ja) アミノ酸塩の製造方法

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230704

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR